A cathode ray tube is filled with hydrogen gas. What must be the minimum kinetic energy of the electron (in eV) so that, when colliding with the atoms of the gas, the wavelength of 656.08nm is observed in the emission spectrum. (Hint: check the spectral lanes of the Balmer series.) ( ) 2.55 eV ( ) 1.89 eV ( ) 12.09 eV ( ) 10.20 eV ( ) 13.06 eV
Compton effect
The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.
Recoil Velocity
The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.
A cathode ray tube is filled with hydrogen gas. What must be the minimum kinetic energy of the electron (in eV) so that, when colliding with the atoms of the gas, the wavelength of 656.08nm is observed in the emission spectrum. (Hint: check the spectral lanes of the Balmer series.)
( ) 2.55 eV
( ) 1.89 eV
( ) 12.09 eV
( ) 10.20 eV
( ) 13.06 eV
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